by: F. Adnan Akyuz, Mark Ewens, Radu Carcoana, Barbara Mullins
Volume 2009, No.1, 1 Jun 2009
Performance of the liquid-in frost depth probe made in-house by the Grand Forks National Weather Service (NWS) Weather Forecast Office (W FO) is compared against soil temperature observations made by North Dakota Agricultural Weather Network (NDAWN) at the Fargo location for a two-year period from 2006-2007 to 2007-2008 winter seasons. While the liquid-in frost depth probe provided continuous frost depth observations, NDAWN soil temperature observations had to be interpolated between measurement points to determine the depth where the soil temperature was 0 °C (32 °F). In general, the trends of both observations matched almost identically; however, the magnitude of the depths varied with liquid-in frost depth probe consistently showing deeper frost depths than the NDAWN soil temperature observations.